HPL Collaborative Desk - Casters - Swerve HPL Laminate resists scratch's, paint, markers, crayons, and food and juice stains far better than melamine. With our out Standing Customer Service, innovative new product lines, and the largest selection of Folding Tables available from any manufacturer, now, more than ever, you can count on Correll. Black adjustable height legs can be set from 25” to 35” in 1” increments and includes Hex Wrench for fast height adjustments.